<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">The rationale for using the same syntax is that a KeyPath is an unapplied property/subscript access. Even the multi-segment part of it isn't necessarily dissimilar: I don't think it would be unreasonable to imagine that \Foo.someMethod.someOtherMethod could work*, that'd just be function composition after all.<div class=""><br class=""></div><div class="">KeyPath : Properties/Subscripts :: Functions with a self argument : Methods<br class=""><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>David</div><div class=""><br class=""></div><div class="">*not proposing this, haven't thought carefully about whether there are edge cases I'm missing here, but I think the analogy holds</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Apr 5, 2017, at 5:16 PM, Patrick Smith via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">I too find the backslash odd, as it’s usually of course used to escape something.<br class=""><br class="">What about three periods?<br class=""><br class=""> let firstFriendsNameKeyPath = Person...friends[0].name<br class=""> print(luke[keyPath: ...friends[0].name])<br class=""><br class=""><br class="">I also find wanting to use the same syntax for unapplied methods strange, as they would product two totally different things: one a key path value, the other a function.<br class=""><br class="">Patrick<br class=""><div class="gmail_quote"><div dir="ltr" class="">On Thu, 6 Apr 2017 at 10:00 am, Douglas Gregor via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class="gmail_msg"><div class="gmail_msg"><blockquote type="cite" class="gmail_msg"><div class="gmail_msg">On Apr 5, 2017, at 4:55 PM, Colin Barrett <<a href="mailto:colin@springsandstruts.com" class="gmail_msg" target="_blank">colin@springsandstruts.com</a>> wrote:</div><br class="m_-4532215789157486227Apple-interchange-newline gmail_msg"><div class="gmail_msg"><div dir="ltr" style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" class="gmail_msg">Is the choice of backslash up for review? I think another operator, </div></div></blockquote><div class="gmail_msg"><br class="gmail_msg"></div></div></div><div style="word-wrap:break-word" class="gmail_msg"><div class="gmail_msg"><div class="gmail_msg">We talked through basically everything on the keyboard, and there really aren’t other options that don’t stomp on existing behavior.</div></div></div><div style="word-wrap:break-word" class="gmail_msg"><div class="gmail_msg"><br class="gmail_msg"><blockquote type="cite" class="gmail_msg"><div class="gmail_msg"><div dir="ltr" style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" class="gmail_msg">perhaps backtick (`), would work better. </div></div></blockquote><div class="gmail_msg"><br class="gmail_msg"></div></div></div><div style="word-wrap:break-word" class="gmail_msg"><div class="gmail_msg"><div class="gmail_msg">Backtick (`) is already taken for escaping identifiers, e.g., </div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg"><span class="m_-4532215789157486227Apple-tab-span gmail_msg" style="white-space:pre-wrap"> </span>var `func` = { /* some code */ }</div><br class="gmail_msg"></div><div class="gmail_msg"><span class="m_-4532215789157486227Apple-tab-span gmail_msg" style="white-space:pre-wrap"> </span>- Doug</div><div class="gmail_msg"><br class="gmail_msg"></div><br class="gmail_msg"></div>_______________________________________________<br class="gmail_msg">
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